Merge remote-tracking branch 'qatar/master'

* qatar/master:
  hls: Call avformat_find_stream_info() on the chained demuxers

Conflicts:
	libavformat/hls.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/hls.c

@@ -576,6 +576,7 @@ static int hls_read_header(AVFormatContext *s)
         ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
         if (ret < 0)
             goto fail;
+
         v->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
         ret = avformat_find_stream_info(v->ctx, NULL);
         if (ret < 0)